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US3632207A - Apparatus for image transfer - Google Patents

Apparatus for image transfer Download PDF

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Publication number
US3632207A
US3632207A US804897A US3632207DA US3632207A US 3632207 A US3632207 A US 3632207A US 804897 A US804897 A US 804897A US 3632207D A US3632207D A US 3632207DA US 3632207 A US3632207 A US 3632207A
Authority
US
United States
Prior art keywords
cables
light source
reflector
light
support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US804897A
Other languages
English (en)
Inventor
Reinhold Wachter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BIO BIELEFELDER OFFSETDRUCKPLA
Original Assignee
BIO BIELEFELDER OFFSETDRUCKPLA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BIO BIELEFELDER OFFSETDRUCKPLA filed Critical BIO BIELEFELDER OFFSETDRUCKPLA
Application granted granted Critical
Publication of US3632207A publication Critical patent/US3632207A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/20—Exposure; Apparatus therefor
    • G03F7/2002—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image
    • G03F7/2008—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image characterised by the reflectors, diffusers, light or heat filtering means or anti-reflective means used
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/02—Exposure apparatus for contact printing
    • G03B27/14—Details
    • G03B27/16—Illumination arrangements, e.g. positioning of lamps, positioning of reflectors

Definitions

  • the present invention relates to an apparatus for transferring images to carriers, and particularly to offset printing plates.
  • the conventional method of photographic printing the transparency in contact with the sensitized carrier is exposed to light whereby the image of the transparency is transferred to the plate.
  • the transparency is held on or between sheets of transparent material and affixed thereto by transparent adhesive tape.
  • This method has the disadvantage that after exposure the edges of the transparency and of the adhesive tape show up as streaks on the transferred image. Before prints can be made from plates so exposed, the streaks must be removed. Retouching or refinishing the plates with an etchproof medium is a difficult and time-consuming operation which absorbs about 50 percent of the total time allotted for finishing a plate. To remove the flaws takes a great deal of concentration and skill; even if a skilled worker spends on the average 2 or 3 hours per plate he is not always able to remove all the imperfections.
  • Another object of the invention is to provide an arrangement which can be easily installed in existing apparatus.
  • a further object of the invention is to save time and labor in refinishing the transferred image.
  • the reflector can easily be installed in conventional printing arrangements. Means are provided to move it toward and away from the light source as well as the printing frame.
  • FIG. l is a schematic side elevational view of an arrangement which embodies the invention.
  • FIG. 2 is an enlarged perspective view of the reflector.
  • FIG. 1 there is shown a printing frame l supporting an offset printing plate 20.
  • a cover 2 including a sheet of glass 21 lies on top of the printing frame 1 and can be moved vertically and pivoted by conventional means.
  • the light source comprising a copying lamp 3 in a housing 23 is suspended above the cover 2.
  • a reflector 4 having the shape of a hollow rectangular box, is mounted between the lamp housing 23 and the frame l.
  • lts steel frame 5 supports walls 6 which, according to one embodiment of the invention, are made from hammered aluminum. The uneven surface of such walls is particularly adapted to diffuse any light falling on it.
  • the edge 9 at the lower end of the hollow reflector 4 adjoins the edge 22 of the cover 2.
  • the reflector has a frustoconical extension 8, tapering o toward a central aperture 7 which is dimensioned to accommodate the lower part of the lamp housing 23 whereby an even more favorable concentration of light is obtained.
  • Hollow guides l0 on each side of the frame l are engageable by runners 1l attached on the exterior of the reflector 4.
  • Cables 12 are symmetrically attached to the top portion of the reflector 4 and are trained over pulleys 13 which are rotatably mounted on the guides l0.
  • Each cable 12 extends into the interior of the respective guide.
  • the ends of cables 12, remote from the points of their attachment to the reflector 4, are connected to movable counterweights 14.
  • the weight of each of the two counterweights 14 shown in the embodiment of FIG. I is equivalent to one-half of the reflector weight, so that the latter can be easily raised or lowered by hand.
  • the weight distribution is such that even at its highest elevation the reflector requires no additional holding means.
  • a transverse support or crosshead l5 mounted on top of the guides l0 reinforces the structure of the arrangement and carries a plurality of rotatable pulleys 16.
  • the lamp housing 23 is suspended on cables 17 which lead over the pulleys 16 to a small winch 18 mounted on one of the lateral guides 10 and which can be manipulated to move the lamp housing up or down.
  • Apparatus for transferring images to offset printing plates comprising support means for supporting an offset printing plate in horizontal position; a light source arranged above said support means and comprising a lamp housing having an opened lower end and a lamp in said housing; hollow reflector means having internal reflecting surfaces interposed between said light source and said support means to form a passageway for the transmission of light from said source toward said support means and for reflecting part of' the light emanating from said source at an acute angle toward said support means, said reflector means comprising a lower portion of polygonal outline and a frustoconical upper portion tapercal direction relative to each other and said support means.
  • Apparatus as defined in claim l wherein said means for moving said light source in vertical directions comprise a transverse support, a plurality of cables attached to said light source, and pulleys provided on said support for said cables.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
US804897A 1968-03-16 1969-03-06 Apparatus for image transfer Expired - Lifetime US3632207A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0075107 1968-03-16

Publications (1)

Publication Number Publication Date
US3632207A true US3632207A (en) 1972-01-04

Family

ID=6978524

Family Applications (1)

Application Number Title Priority Date Filing Date
US804897A Expired - Lifetime US3632207A (en) 1968-03-16 1969-03-06 Apparatus for image transfer

Country Status (9)

Country Link
US (1) US3632207A (de)
AT (1) AT301337B (de)
BE (1) BE727397A (de)
CH (1) CH497714A (de)
ES (1) ES362763A1 (de)
FR (1) FR1601297A (de)
GB (1) GB1232945A (de)
LU (1) LU57667A1 (de)
NL (1) NL6902249A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5474735A (en) * 1977-11-28 1979-06-15 Hideo Chishima Lens mount and information mount sliding device for copying machine
US4582422A (en) * 1983-07-25 1986-04-15 Stroud Edward J F Apparatus for forming relief plates from liquid photo-sensitive resin
WO1996034747A1 (en) * 1995-05-02 1996-11-07 Krause Danmark A/S Laser exposure apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE508134C (de) * 1925-03-04 1930-09-24 Franz Brandt Vorrichtung zur Reihenuebertragung von Lithographien u. dgl. auf Maschinensteine und Zinkplatten

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE508134C (de) * 1925-03-04 1930-09-24 Franz Brandt Vorrichtung zur Reihenuebertragung von Lithographien u. dgl. auf Maschinensteine und Zinkplatten

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5474735A (en) * 1977-11-28 1979-06-15 Hideo Chishima Lens mount and information mount sliding device for copying machine
US4582422A (en) * 1983-07-25 1986-04-15 Stroud Edward J F Apparatus for forming relief plates from liquid photo-sensitive resin
WO1996034747A1 (en) * 1995-05-02 1996-11-07 Krause Danmark A/S Laser exposure apparatus
US5909236A (en) * 1995-05-02 1999-06-01 Krause Danmark A/S Laser exposure apparatus

Also Published As

Publication number Publication date
CH497714A (de) 1970-10-15
GB1232945A (de) 1971-05-26
BE727397A (de) 1969-07-01
AT301337B (de) 1972-08-25
FR1601297A (de) 1970-08-10
NL6902249A (de) 1969-09-18
LU57667A1 (de) 1969-04-15
ES362763A1 (es) 1970-11-16

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